When cats are happy, they may squeeze their eyes shut.
10
The reindeer is the only mammal that can see UV light.
17
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Lobsters have blue blood.
476
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
In Australia, there are spiders big enough to eat snakes.
20